HydroBASINS lev08 watershed · #2080526210
Bassin de la Chalaronne
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 1 administrative regions : Ain
Sub-basin area
333,4km²
Upstream area
333,7km²
Discharge
4,82m³/s
Mean elev.
265m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
1 dept-equivalent regions (GADM L2)
- 334.2 km²100.0% of basin
37 communes (GADM L5)Available for FRA, RWA
- Saint-Trivier-sur-Moignans32.54 km²78% commune
- Sandrans28.90 km²100% commune
- Bouligneux26.01 km²100% commune
- Saint-Étienne-sur-Chalaronne21.32 km²99% commune
- Lapeyrouse20.65 km²100% commune
- Châtillon-sur-Chalaronne17.83 km²100% commune
- Villars-les-Dombes17.09 km²70% commune
- Birieux15.16 km²96% commune
- L'Abergement-Clémenciat13.87 km²86% commune
- La Chapelle-du-Châtelard12.72 km²91% commune
- Relevant12.61 km²100% commune
- Saint-Didier-sur-Chalaronne12.35 km²48% commune
- Monthieux10.71 km²100% commune
- Ambérieux-en-Dombes9.58 km²58% commune
- Baneins9.18 km²100% commune
- Saint-Marcel8.81 km²77% commune
- Sainte-Olive7.54 km²100% commune
- Saint-André-de-Corcy7.29 km²34% commune
- Villeneuve5.55 km²21% commune
- Illiat5.06 km²25% commune
- Romans4.46 km²20% commune
- Dompierre-sur-Chalaronne4.20 km²100% commune
- Valeins4.18 km²100% commune
- Joyeux3.16 km²19% commune
- Saint-Germain-sur-Renon3.10 km²18% commune
- Chaneins2.89 km²23% commune
- Le Montellier2.70 km²17% commune
- Le Plantay2.54 km²12% commune
- Sulignat2.51 km²24% commune
- Saint-Jean-de-Thurigneux2.39 km²15% commune
- Marlieux2.25 km²14% commune
- Mogneneins1.57 km²19% commune
- Civrieux0.94 km²5% commune
- Saint-Georges-sur-Renon0.86 km²16% commune
- Peyzieux-sur-Saône0.67 km²7% commune
- Montluel0.55 km²1% commune
- Neuville-les-Dames0.46 km²2% commune
3 intersecting protected areas
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 183 distinct species · 155 891 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de la Chalaronne : 22 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 107 interactions GloBI sur 6 types (connectance 16.1%, filtre Serrano α=0.2). 15 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
10,9°C
Annual rain
812mm
Moisture idx (CMI)
-0,09
Runoff
456mm/an
PET
892mm
AET
656mm
Mean slope
1,0°
Water table
60cm
Forest
4%
Crops
23%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)